343 lines
8.5 KiB
C
343 lines
8.5 KiB
C
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/*
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Copyright 2012 Jun Wako <wakojun@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* scan matrix
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*/
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef USE_I2C
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// provides memcpy for copying TWI slave buffer
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// #include <string.h>
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#endif
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#include <avr/io.h>
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#include <avr/wdt.h>
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#include <avr/interrupt.h>
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#include <util/delay.h>
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#include "print.h"
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#include "debug.h"
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#include "util.h"
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#include "matrix.h"
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#include "split_util.h"
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#include "pro_micro.h"
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#include "config.h"
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#ifdef USE_I2C
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# include "i2c.h"
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#else // USE_SERIAL
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# include "serial.h"
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#endif
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#ifndef DEBOUNCE
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# define DEBOUNCE 5
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#endif
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#define ERROR_DISCONNECT_COUNT 5
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static uint8_t debouncing = DEBOUNCE;
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static const int ROWS_PER_HAND = MATRIX_ROWS/2;
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static uint8_t error_count = 0;
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static const uint8_t row_pins[MATRIX_ROWS] = MATRIX_ROW_PINS;
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static const uint8_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS;
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/* matrix state(1:on, 0:off) */
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static matrix_row_t matrix[MATRIX_ROWS];
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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static matrix_row_t read_cols(void);
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static void init_cols(void);
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static void unselect_rows(void);
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static void select_row(uint8_t row);
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__attribute__ ((weak))
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void matrix_init_kb(void) {
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matrix_init_user();
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}
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__attribute__ ((weak))
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void matrix_scan_kb(void) {
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matrix_scan_user();
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}
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__attribute__ ((weak))
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void matrix_init_user(void) {
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}
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__attribute__ ((weak))
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void matrix_scan_user(void) {
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}
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inline
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uint8_t matrix_rows(void)
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{
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return MATRIX_ROWS;
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}
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inline
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uint8_t matrix_cols(void)
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{
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return MATRIX_COLS;
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}
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void matrix_init(void)
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{
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debug_enable = true;
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debug_matrix = true;
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debug_mouse = true;
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// initialize row and col
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unselect_rows();
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init_cols();
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TX_RX_LED_INIT;
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// initialize matrix state: all keys off
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for (uint8_t i=0; i < MATRIX_ROWS; i++) {
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matrix[i] = 0;
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matrix_debouncing[i] = 0;
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}
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matrix_init_quantum();
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}
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uint8_t _matrix_scan(void)
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{
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// Right hand is stored after the left in the matrix so, we need to offset it
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int offset = isLeftHand ? 0 : (ROWS_PER_HAND);
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for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
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select_row(i);
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_delay_us(30); // without this wait read unstable value.
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matrix_row_t cols = read_cols();
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if (matrix_debouncing[i+offset] != cols) {
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matrix_debouncing[i+offset] = cols;
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debouncing = DEBOUNCE;
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}
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unselect_rows();
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}
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if (debouncing) {
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if (--debouncing) {
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_delay_ms(1);
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} else {
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for (uint8_t i = 0; i < ROWS_PER_HAND; i++) {
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matrix[i+offset] = matrix_debouncing[i+offset];
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}
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}
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}
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return 1;
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}
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#ifdef USE_I2C
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// Get rows from other half over i2c
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int i2c_transaction(void) {
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int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
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int err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_WRITE);
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if (err) goto i2c_error;
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// start of matrix stored at 0x00
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err = i2c_master_write(0x00);
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if (err) goto i2c_error;
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// Start read
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err = i2c_master_start(SLAVE_I2C_ADDRESS + I2C_READ);
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if (err) goto i2c_error;
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if (!err) {
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/*
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// read from TWI byte-by-byte into matrix_row_t memory space
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size_t i;
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for (i = 0; i < SLAVE_BUFFER_SIZE-1; ++i) {
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*((uint8_t*)&matrix[slaveOffset]+i) = i2c_master_read(I2C_ACK);
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}
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// last byte to be read / end of chunk
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*((uint8_t*)&matrix[slaveOffset]+i) = i2c_master_read(I2C_NACK);
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*/
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// kludge for column #9: unpack bits for keys (2,9) and (3,9) from (1,7) and (1,8)
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// i2c_master_read(I2C_ACK);
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matrix[slaveOffset+0] = i2c_master_read(I2C_ACK);
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// i2c_master_read(I2C_ACK);
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matrix[slaveOffset+1] = (matrix_row_t)i2c_master_read(I2C_ACK)\
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| (matrix[slaveOffset+0]&0x40U)<<2;
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// i2c_master_read(I2C_ACK);
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matrix[slaveOffset+2] = (matrix_row_t)i2c_master_read(I2C_NACK)\
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| (matrix[slaveOffset+0]&0x80U)<<1;
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// clear highest two bits on row 1, where the col9 bits were transported
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matrix[slaveOffset+0] &= 0x3F;
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i2c_master_stop();
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} else {
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i2c_error: // the cable is disconnected, or something else went wrong
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i2c_reset_state();
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return err;
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}
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return 0;
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}
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#else // USE_SERIAL
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int serial_transaction(void) {
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int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
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if (serial_update_buffers()) {
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return 1;
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}
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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matrix[slaveOffset+i] = serial_slave_buffer[i];
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}
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return 0;
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}
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#endif
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uint8_t matrix_scan(void)
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{
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int ret = _matrix_scan();
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#ifdef USE_I2C
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if( i2c_transaction() ) {
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#else // USE_SERIAL
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if( serial_transaction() ) {
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#endif
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// turn on the indicator led when halves are disconnected
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TXLED1;
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error_count++;
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if (error_count > ERROR_DISCONNECT_COUNT) {
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// reset other half if disconnected
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int slaveOffset = (isLeftHand) ? (ROWS_PER_HAND) : 0;
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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matrix[slaveOffset+i] = 0;
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}
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}
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} else {
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// turn off the indicator led on no error
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TXLED0;
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error_count = 0;
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}
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matrix_scan_quantum();
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return ret;
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}
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void matrix_slave_scan(void) {
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_matrix_scan();
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int offset = (isLeftHand) ? 0 : ROWS_PER_HAND;
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#ifdef USE_I2C
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// SLAVE_BUFFER_SIZE is from i2c.h
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// (MATRIX_ROWS/2*sizeof(matrix_row_t))
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// memcpy((void*)i2c_slave_buffer, (const void*)&matrix[offset], (ROWS_PER_HAND*sizeof(matrix_row_t)));
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// kludge for column #9: put bits for keys (2,9) and (3,9) into (1,7) and (1,8)
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i2c_slave_buffer[0] = (uint8_t)(matrix[offset+0])\
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| (matrix[offset+1]&0x100U)>>2\
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| (matrix[offset+2]&0x100U)>>1;
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i2c_slave_buffer[1] = (uint8_t)(matrix[offset+1]);
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i2c_slave_buffer[2] = (uint8_t)(matrix[offset+2]);
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// note: looks like a possible operator-precedence bug here, in last version?
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/*
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i2c_slave_buffer[1] = (uint8_t)matrix[offset+0];
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i2c_slave_buffer[2] = (uint8_t)(matrix[offset+1]>>8);
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i2c_slave_buffer[3] = (uint8_t)(matrix[offset+1]>>8);
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i2c_slave_buffer[4] = (uint8_t)(matrix[offset+2]>>8);
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i2c_slave_buffer[5] = (uint8_t)matrix[offset+2];
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*/
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#else // USE_SERIAL
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for (int i = 0; i < ROWS_PER_HAND; ++i) {
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serial_slave_buffer[i] = matrix[offset+i];
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}
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#endif
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}
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bool matrix_is_modified(void)
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{
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if (debouncing) return false;
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return true;
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}
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inline
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bool matrix_is_on(uint8_t row, uint8_t col)
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{
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return (matrix[row] & ((matrix_row_t)1<<col));
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}
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inline
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matrix_row_t matrix_get_row(uint8_t row)
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{
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return matrix[row];
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}
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void matrix_print(void)
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{
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print("\nr/c 0123456789ABCDEF\n");
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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phex(row); print(": ");
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pbin_reverse16(matrix_get_row(row));
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print("\n");
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}
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}
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uint8_t matrix_key_count(void)
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{
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uint8_t count = 0;
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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count += bitpop16(matrix[i]);
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}
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return count;
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}
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static void init_cols(void)
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{
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for(int x = 0; x < MATRIX_COLS; x++) {
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_SFR_IO8((col_pins[x] >> 4) + 1) &= ~_BV(col_pins[x] & 0xF);
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_SFR_IO8((col_pins[x] >> 4) + 2) |= _BV(col_pins[x] & 0xF);
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}
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}
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static matrix_row_t read_cols(void)
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{
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matrix_row_t result = 0;
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for(int x = 0; x < MATRIX_COLS; x++) {
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result |= (_SFR_IO8(col_pins[x] >> 4) & _BV(col_pins[x] & 0xF)) ? 0 : (1 << x);
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}
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return result;
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}
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static void unselect_rows(void)
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{
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for(int x = 0; x < ROWS_PER_HAND; x++) {
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_SFR_IO8((row_pins[x] >> 4) + 1) &= ~_BV(row_pins[x] & 0xF);
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_SFR_IO8((row_pins[x] >> 4) + 2) |= _BV(row_pins[x] & 0xF);
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}
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}
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static void select_row(uint8_t row)
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{
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_SFR_IO8((row_pins[row] >> 4) + 1) |= _BV(row_pins[row] & 0xF);
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_SFR_IO8((row_pins[row] >> 4) + 2) &= ~_BV(row_pins[row] & 0xF);
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}
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